Cook, S. (2011). Customer care excellence: How to create an effective customer focus (6th ed.). Kogan Page.
Chicago-viite (17. p.)Cook, Sarah. Customer Care Excellence: How to Create an Effective Customer Focus. 6th ed. London ; Philadelphia: Kogan Page, 2011.
MLA-viite (9. p.)Cook, Sarah. Customer Care Excellence: How to Create an Effective Customer Focus. 6th ed. Kogan Page, 2011.
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